Lawicel CAN Products
CANUSB and CAN232
Both these devices appear to the PC programmer as serial
ports and are programmed by sending ASCII strings such as the following
Transmit a standard (11bit)
iii is the message Identifier in hex (000-7FF)
l is the Data length (0-8)
dd the data byte values in hex (00-FF).
Sends an 11bit CAN frame with ID=0x100, and 2 bytes of
data with the value 0x11 and 0x33
The CAN232 and CANUSB are almost completely program compatible.
CANUSB - a USB to CAN interface
The Lawicel CANUSB interface looks to the PC like a serial device and
is easily programmed by sending the requires string of characters to the USB's
simulated COM: port.
CANUSB is a very small dongle that plugs into
any PC USB Port and gives an instant CAN connectivity. It is treated
by software as a standard COM: Port (serial RS232 port) which
eliminates the need for any extra drivers and makes programming of
simple CAN sequences very easy for the novice VB or C programmer.
transmitting and receiving being done in standard ASCII format.
Installing a direct driver DLL allows faster communications and
higher CAN bus loads.
Compliant with CAN
2.0A (11bit ID's) and CAN 2.0B (29bit ID's)
Handles up to 1Mbit/s CAN bit rate
USB 2.0 Full Speed
Philips 82C251 CAN Transceiver (Fully Compatible with ISO
Supports RTR frames
A FIFO buffer for incoming frames holds up to 32 CAN messages
Time Stamp option in mS for incoming frames
CANbus connection according to CiA DS102-1 standard
Power supplied via the USB port
Low level Ascii Commands via USB COM: class driver, DLL or
Windows Vista, 7, 8 32 bit
Free Linux driver available
Industrial temperature range -40C to +85C
The connections on the CANUSB box are
standard 9 way D pins CAN
and standard USB-B female
The cable therefore required to connect to a PC is a USB-A male
to USB-B male ( also known as a USB printer cable )
Note that the box is available from COMSOL either with or without
a 1 Meter cable
The cable length may be selected to suit customer demands,
however for distances over 5M or in harsh industrial
environments customers are working outside the USB standard
and will need to investigate/test the units performance
possibly using active cables.
Other than the absence of a cable this unit is electronically
and software compatible with the older CANUSB design
||Note that the CANUSB and CAN232
are supplied with a simple bus monitor and example programs -
they are not supported by the advanced data logging
PCAN Explorer application.
CAN232 - an RS232 serial to CAN interface
The Lawicel CAN232 interface provide a simple and lowest cost connection between
micro-controllers, PCs and other intelligent hosts and a CAN-network.
|CAN232 supports both 11 bit
ID and 29 bit ID CAN specifications with a maximum throughput of 1000
short messages/sec at 115,200 baud.
The RS232 interface standard is ideal for use with PCs where it can be
connected to a standard COM port with no system software as well as
allowing legacy equipment to easily interface to CAN.
CAN232 includes a 32 message receive buffer, a millisecond time
stamp on messages if required and an Auto Poll mode in which all CAN
messages are passed directly to the RS232 port without having to be
requested individually. Firmware can be uploaded to
incorporate new features as they are released.
Simple monitor and transmit applications are available that are
written in Delphi and VB6. Source is supplied so they act both
as test/setup tools and as sample code to get you going. C++
and Linux code is also available.
We can also supply this product as a DIP28 package for you to integrate
into your application ( with or without RS232 Level transceiver ).
Prices for one off are on the web shop call us for volume pricing.
8 -15 Volts DC at 100 mA power is required between 9 & 3
For more Information on :-
||CAN modules with
configurable digital and analogue I/O.
||Parallel, PCMCIA, PC, ISA, PCI, PC104
performance CAN cables, converters and termination
||Our technical summary
for those new to CAN